211167868642 has 4 divisors (see below), whose sum is σ = 316751802966. Its totient is φ = 105583934320.

The previous prime is 211167868607. The next prime is 211167868673. The reversal of 211167868642 is 246868761112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149305732801 + 61862135841 = 386401^2 + 248721^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211167868642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52791967159 + ... + 52791967162.

Almost surely, 2^211167868642 is an apocalyptic number.

211167868642 is a deficient number, since it is larger than the sum of its proper divisors (105583934324).

211167868642 is a wasteful number, since it uses less digits than its factorization.

211167868642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105583934323.

The product of its digits is 1548288, while the sum is 52.

The spelling of 211167868642 in words is "two hundred eleven billion, one hundred sixty-seven million, eight hundred sixty-eight thousand, six hundred forty-two".